Apparatus

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sensors Mode-S transponder

78157D

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-207J · BOEING 787-9 Dreamliner

Hex
78157D
Octal
36012575
Decimal
7,869,821
Country
CN
Tail
B-207J
Type
B789
No current signal · last broadcast 45m ago
Flights observed
114
Distinct callsigns
20
Country
CN
Last broadcast
45m ago

Last known position

Most recent position reported by Mode-S 78157D.

Country allocation

The ICAO 24-bit address 78157D falls within the block assigned to China (CN) by ICAO Annex 10, Volume III. Every aircraft registered in China receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
CHH7921 Hainan Airlines 17 2026-05-08
CHH7922 Hainan Airlines 13 2026-05-09
CHH7711 Hainan Airlines 4 2026-06-16
CHH7704 - 4 2026-06-19
CHH7714 Hainan Airlines 3 2026-06-12
CHH7707 - 3 2026-06-17
CHH7396 Hainan Airlines 3 2026-05-28
CHH7395 Hainan Airlines 3 2026-05-26
CHH492 - 3 2026-06-24
CHH491 - 3 2026-06-23
CHH7974 Hainan Airlines 2 2026-04-27
CHH7973 Hainan Airlines 2 2026-04-27
CHH7970 - 2 2026-06-20
CHH7960 - 2 2026-06-18
CHH790 Hainan Airlines 2 2026-04-25
CHH789 Hainan Airlines 2 2026-04-25
CHH786 - 2 2026-07-10
CHH775 Hainan Airlines 2 2026-04-22
CHH7709 Hainan Airlines 2 2026-05-16
CHH761 Hainan Airlines 2 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CHH727 - Jul 14, 22:40 UTCJul 14, 23:15 UTC34m
2026-07-13 CHH470 - Jul 13, 11:05 UTCJul 13, 17:05 UTC6h 0m
2026-07-12 CHH469 - Jul 12, 22:50 UTCJul 13, 05:15 UTC6h 25m
2026-07-11 CHH7567 - Jul 11, 19:15 UTCJul 11, 19:30 UTC15m
2026-07-10 CHH786 - Jul 10, 11:55 UTCJul 10, 19:30 UTC7h 35m
2026-07-10 CHH786 - Jul 10, 08:55 UTCJul 10, 09:05 UTC10m
2026-07-09 CHH785 - Jul 9, 19:35 UTCJul 10, 05:10 UTC9h 35m
2026-07-08 CHH728 - Jul 8, 10:55 UTCJul 8, 15:45 UTC4h 50m
2026-07-07 CHH727 - Jul 7, 23:55 UTCJul 8, 07:40 UTC7h 45m
2026-07-06 CHH7157 - Jul 6, 23:35 UTCJul 6, 23:50 UTC15m
2026-07-06 CHH7852 - Jul 6, 16:15 UTCJul 6, 16:25 UTC10m
2026-07-01 CHH7437 - Jul 1, 08:45 UTCJul 1, 09:00 UTC15m
2026-07-01 CHH7277 - Jul 1, 00:25 UTCJul 1, 00:40 UTC15m
2026-06-25 CHH7246 - Jun 25, 14:59 UTCJun 25, 15:20 UTC20m
2026-06-25 CHH7245 - Jun 25, 06:14 UTCJun 25, 06:30 UTC15m
2026-06-24 CHH492 - Jun 24, 11:34 UTCJun 24, 20:30 UTC8h 55m
2026-06-23 CHH491 - Jun 23, 19:04 UTCJun 24, 04:20 UTC9h 15m
2026-06-22 CHH408 - Jun 22, 20:00 UTCJun 22, 20:10 UTC10m
2026-06-22 CHH408 - Jun 22, 11:19 UTCJun 22, 17:29 UTC6h 10m
2026-06-21 CHH407 - Jun 21, 20:24 UTCJun 22, 06:10 UTC9h 45m
2026-06-21 CHH7246 - Jun 21, 14:34 UTCJun 21, 14:54 UTC20m
2026-06-21 CHH7245 PEK → URC Jun 21, 06:55 UTCJun 21, 07:14 UTC20m
2026-06-20 CHH7970 - Jun 20, 17:29 UTCJun 20, 17:39 UTC10m
2026-06-20 CHH7970 - Jun 20, 09:09 UTCJun 20, 11:49 UTC2h 40m
2026-06-19 CHH7969 - Jun 19, 23:04 UTCJun 20, 05:19 UTC6h 15m
2026-06-19 CHH7704 - Jun 19, 04:54 UTCJun 19, 05:09 UTC15m
2026-06-18 CHH7960 - Jun 18, 22:35 UTCJun 18, 22:50 UTC15m
2026-06-18 CHH7960 - Jun 18, 09:15 UTCJun 18, 19:40 UTC10h 25m
2026-06-17 CHH7959 SZX → YVR Jun 17, 21:40 UTCJun 18, 07:15 UTC9h 35m
2026-06-17 CHH7707 - Jun 17, 09:10 UTCJun 17, 09:20 UTC10m
2026-06-17 CHH7704 - Jun 17, 01:20 UTCJun 17, 01:35 UTC15m
2026-06-16 CHH7711 PEK → SZX Jun 16, 15:00 UTCJun 16, 15:20 UTC20m
2026-06-14 CHH492 - Jun 14, 11:30 UTCJun 14, 18:00 UTC6h 30m
2026-06-13 CHH491 - Jun 13, 23:15 UTCJun 14, 05:20 UTC6h 5m
2026-06-12 CHH7714 SZX → PEK Jun 12, 13:50 UTCJun 12, 14:05 UTC15m
2026-06-12 CHH7714 SZX → PEK Jun 12, 11:30 UTCJun 12, 11:40 UTC10m
2026-06-12 CHH7025 HAK → SZX Jun 12, 09:45 UTCJun 12, 10:05 UTC20m
2026-06-12 CHH7024 NKG → SYX Jun 12, 06:35 UTCJun 12, 06:45 UTC10m
2026-06-08 CHH7768 KMG → SZX Jun 8, 05:20 UTCJun 8, 05:30 UTC10m
2026-06-07 CHH7767 SZX → KMG Jun 7, 23:35 UTCJun 8, 00:30 UTC55m
2026-06-06 CHH470 BRU → CKG Jun 6, 10:20 UTCJun 6, 16:30 UTC6h 10m
2026-06-05 CHH469 CKG → BRU Jun 5, 22:50 UTCJun 6, 05:25 UTC6h 35m
2026-06-05 CHH7357 SZX → CKG Jun 5, 12:30 UTCJun 5, 12:45 UTC15m
2026-05-31 CHH7711 PEK → SZX May 31, 12:25 UTCMay 31, 12:45 UTC20m
2026-05-29 CHH7714 SZX → PEK May 29, 13:50 UTCMay 29, 14:00 UTC10m
2026-05-29 CHH7025 HAK → SZX May 29, 09:30 UTCMay 29, 10:00 UTC30m
2026-05-28 CHH7396 HGH → SZX May 28, 12:40 UTCMay 28, 13:05 UTC25m
2026-05-26 CHH7396 HGH → SZX May 26, 11:50 UTCMay 26, 12:10 UTC20m
2026-05-26 CHH7395 SZX → HGH May 26, 07:10 UTCMay 26, 07:19 UTC10m
2026-05-25 CHH7396 HGH → SZX May 25, 12:40 UTCMay 25, 13:00 UTC20m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the B-207J page for operator, model, and routing details .

Mode-S 78157D frequently asked

What is Mode-S code 78157D?
78157D is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-207J.
Where is Mode-S 78157D registered?
Mode-S code 78157D is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78157D broadcasting right now?
No active broadcast right now. Last signal was 45m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78157D, octal 36012575, decimal 7,869,821.
What flights does 78157D operate?
Mode-S 78157D has broadcast 20 distinct callsigns, including CHH7921, CHH7922, CHH7711, CHH7704, CHH7714.